We'd by lying if we said that the sight of the Grim Reaper standing by our bedside, scythe in hand, wouldn't scare the daylights out of us. How did this well-known personification of death become so frightening?

Even if you've never seen a zombie movie, you probably know something about the walking dead. But did you know that zombies have their roots in folklore and -- according to some researchers -- in real events in Haiti?